Kicks out the front center another 20mm or so, lowers the grip height, steepens STA, lowers BB. I'd run cranks no longer than 165.
Sorry. No. I know what an angleset does. I've been using anglesets for years.
I should have been more specific. What I was asking was why do you want a 63deg HA E-Enduro bike?
E-sommets are slightly slacker (HA) than the geometry chart states (both my 2019 and 2018 E-sommet VR smalls are sub 65deg)
If you're using it as a motor assisted uplift DH bike then by all means go for it. But if you are using the bike as an allrounder too I'd actually be wary of the negative aspects slackening the HA out to DH head angles will bring to all round riding/handling.
BTW fitting a -2deg headset really doesn't do all those things you mentioned. Not noticably anyway.
Yes it will lengthen the front centre by about 20mm (this isn't necessarily always good thing)
As for the rest it will only lower the head tube (stack) by around 1mm meaning the BB will lower around a third of that (ie un noticable)
this may well be negated depending on which brand headset you fit. eg. Superstar components headset cups are around 1mm thicker at the lip than the standard vitus cups so would negate any headtube drop. (BBheight/STA would remain the same)
Even if it does lower the headtube 1mm you won't actually notice any difference in seat tube angle from that tiny of a reduction in stack.
I've no idea what you mean about lowering "grip height" but 20mm longer front centre generally means less weight on the front wheel (which equals less front tyre grip. not more).
Being in the US I'd assume this is all theory on your part. Or do you actaully have a vitus? or have ridden one?